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Microsporidia transmission in gypsy moth populations

Project Leader
Hoch Gernot, Project Leader
Duration:
01.09.2003-31.08.2008
EU-Project Instruments
Integrated Project (IP)
Type of Research
Basic Research
Project partners
Forest Research Institute, Banska Stiavnica, Slovakia.
Contact person: Milan Zubrik;
Function of the Project Partner: Partner
USDA Forest Service, North Eastern Research Station, North Eastern Center for Forest Health Research, Hamden, CT, 51 Millpond Rd., CT 06514 Hamden, United States (USA).
Contact person: Michael L. McManus;
Function of the Project Partner: Koordinator
Staff
BOKU Research Units
Institute of Forest Entomology, Forest Pathology and Forest Protection
Funded by
USDA Forest Service, United States (USA)
Abstract
Previous studies of microsporidian disease of the gypsy moth, Lymantria dispar, have focused on issues such as host-specificity, physiology, and taxonomy. However, the questions remain: what limiting effects can microsporidia have on gypsy moth populations? What density of infected insects is required to initiate and maintain an epizootic? How well are infections transmitted per unit of time/infected insect? Laboratory experiments do not allow enough natural behavior or environmental factors to give realistic estimates of transmission. We will use small-scale field experiments that approximate natural conditions in entire trees enclosed in cages. Gypsy moth larvae will be kept together for much of the field season on small enclosed trees. By varying the density of diseased and susceptible larvae in each experimental unit, it should be possible to use simple mathematical models to predict transmission of a microsporidian pathogen in outbreak populations. Moreover, the spread and severity of the disease during larval stages can be quantified. We expect to gain new knowledge of parameters describing transmission of microsporidia in field populations, which may contribute to a better understanding of the role of microsporidia in the population dynamics of their host, the gypsy moth.
Keywords
animal ecology; forest entomology; forest protection;
transmission; Lymantria dispar; Microsporidia; population dynamics;
Publications

** Hoch, G; Pilarska, DK; Dobart, N Effect of midgut infection with the microsporidium Endoreticulatus schubergi on carbohydrate and lipid levels in Lymantria dispar larvae.

J PEST SCI. 2009; 82(4): 351-356. WoS FullText FullText_BOKU

Hoch, G. (2009): Microsporidian pathogens of forest Lepidoptera: Ecological and physiological interactions between host and pathogen.
[2nd Entomopathogens and Microbial Control Symposium 2009, Mugla, Turkey, 24.09.2009 - 27.09.2009]

In: Hazir, S. (Ed.), 2nd Entomopathogens and Microbial Control Symposium, 24-27 September 2009, Mugla, Turkey, 42-43

** Hoch, G; D"Amico, V; Solter, LF; Zubrik, M; McManus, ML; Quantifying horizontal transmission of Nosema lymantriae, a microsporidian pathogen of the gypsy moth, Lymantria dispar (Lep., Lymantriidae) in field cage studies..

J Invertebr Pathol. 2008; 99(2):146-150 WoS PubMed FullText FullText_BOKU

Hoch, G., D'Amico, V., Solter, L.F., Zubrik, M., McManus, M.L. (2008): Two approaches fro quantifying transmission of microsporidia in semi-field conditions. [Poster]
[18th USDA Interagency Research Forum on Gypsy Moth and Other Invasive Species 2007, Annapolis, MD, USA, 09.01.2007 - 12.01.2007]

In: Gottschalk, K.W. (Ed.), Proceedings 18th USDA Interagency Research Forum on Gypsy Moth and Other Invasive Species. US Forest Service Gen. Techn. Report NRS-P-28, USDA Forest Service, Newtown Square. p. 39

Glavendekic, M., Pilarska, D., Mihajlovic, L., Linde, A., Kolling, T., Hoch, G. (2006): Microsporidian infections in Lymantria dispar L. (Lepidoptera, Lymantriidae) population in Serbia .
[International Conference Sustainable Use of Forest Ecosystems 2006, Donji Milanovac, Republic of Serbia, 08.11.2006 - 10.11.2006]

In: Rakonjac, L. (Ed.), International Conference Sustainable Use of Forest Ecosystems - Proceedings, Institute of Forestry, Belgrade, International Conference , 8-10 Nov. 2006, Donji Milanovac, 275-279; ISBN: 978-86-80439-07-5

Hoch, G., D'Amico, V., Solter, L.F., McManus, M.L., Zubrik, M. (2005): Quantifying transmission of microsporidia in the field.
[16th USDA Interagency Research Forum on Gypsy Moth and other Invasive Species 2005, Annapolis, MD, USA, 18.01.2005 - 21.01.2005]

In: Gottschalk, K.W.: 16th USDA Interagency Research Forum on Gypsy Moth and other Invasive Species, Jan. 18-21, 2005, Annapolis, MD, USA; USDA-FS General Technical Report, NE-337, 41; USDA Forest Service, Newtown Square, PA FullText

Vorträge

Hoch, G., Goertz, D. (2009): Understanding transmission of microsporidia: A prerequisite for their use in inoculative biological control of forest insects. [Poster]

, Tagung der Deutschen Gesellschaft für allgemeine und angewandte Entomologie, Mar 16-19, 2009, Göttingen, GERMANY

Pollan, S., Goertz, D., Hoch, G. (2009): Effect of temperature on development of the microsporidium Nosema lymantriae and disease progress in the host, Lymantria dispar. [Poster]

, Tagung der Deutschen Gesellschaft für allgemeine und angewandte Entomologie, MAR 16-19, 2009, Göttingen, GERMANY

Pollan, S., Steyer, C., Goertz, D., Hoch, G. (2009): Temperature and simulated rain affect horizontal transmission of the microsporidium Nosema lymantriae. [Poster]

, 42nd Annual Meeting of the Society for Invertebrate Pathology, August 16-20, 2009, Park City, Utah, USA

Steyer, C., Goertz, D., Hoch, G. (2009): Effects of simulated rainfall on horizontal transmission of the microsporidium, Nosema lymantriae. [Poster]

, 20th USDA Interagency Research Forum on Invasive Species, JAN 13-16, 2009, Annapolis, MD

D'Amico V., Hoch G., Solter, L.F., Zubrik, M., McManus, M.L. (2007): Microsporidia transmission in forest Lepidoptera, Part II: Transmission of Nosema lymantriae in the field.

IUFRO Conference "Natural enemies and other multi-scale influences on forest insects" , 9-14 September 2007, Vienna

Hoch, G., D'Amico, V., Solter, L.F., McManus, M.L., Zubrik, M. (2007): Two approaches for quantifying transmission of microsporidia in semi-field conditions. [Poster]

18th USDA Interagency Research Forum on Invasive Species, 9.-12.1.2007, Annapolis, MD

Pilarska, D.K., Dobart, N., Hoch, G. (2007): Effects of midgut infection with the microsporidium Endoreticulatus schubergi on carbohydrate and lipid levels in Lymantria dispar larvae. [Poster]

IUFRO Conference "Natural enemies and other multi-scale influences on forest insects", 9-14 September 2007, Vienna

Glavendekic, M., Pilarska, D., Mihajlovic, L., Linde, A., Kolling, T., Hoch, G. (2006): Microsporidian infections in Lymantria dispar L. (Lepidoptera, Lymantriidae) population in Serbia .

International Conference "Sustainable Use of Forest Ecosystems", 8-10 Nov. 2006, Donji Milanovac

Hoch, G., D'Amico, V., Goertz, D., Solter, L.F. (2006): Quantifying transmission of microsporidia in the gypsy moth, Lymantria dispar. [Oral Communication]

39th Annual Meeting of the Society for Invertebrate Pathology, Aug. 27 - Sep. 1, Wuhan

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